dschmidt opened a new pull request, #3037:
URL: https://github.com/apache/tika/pull/3037
NEF/NRW raw files embed a camera-generated full-resolution JPEG preview
(SubIFD0, JPEGInterchangeFormat/-Length), but Tika parses NEF as plain TIFF and
gives no access to it.
* New `NEFParser` (image module): claims `image/x-raw-nikon`, inherits
TIFF/EXIF/XMP metadata extraction from `TiffParser`, walks IFD0 plus SubIFDs
and emits each embedded JPEG preview through the `EmbeddedDocumentExtractor`
(`image/jpeg`, `THUMBNAIL`, `thumbnail-N.jpg`). Offsets/lengths are
bounds-checked, the JPEG SOI marker is required, IFD counts are capped.
Configurable via `"nef-parser": {"extractPreviews": false}`.
* `image/x-raw-nikon` is now a `sub-class-of image/tiff`, so name+data
detection resolves NEF to the specific type (data-only detection stays
`image/tiff`, NEF has no reliable magic).
* Test file `testNEF.nef` (~2KB) is fully synthetic, generated to mirror the
IFD layout of real D3000/D80 files (no camera data).
Tested: unit tests, detection tests, full image-module suite, plus
end-to-end against real D80/D3000 NEFs (preview 3872x2592 extracted, /rmeta and
/unpack deliver it).
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